With 003-091-ursula-deceiver-of-all doubling songs and 002-089-prince-john-greediest-of-all really putting the hurt with every discard, Emerald Steel promises a lot of card advantage, especially with an unanswered 004-070-diablo-devoted-herald
In order to prevent the opponent from becoming the monarch, Palace Jailer will exile one of their creatures, making it harder for them to take that title from you
Kefka, Dancing Mad Decks on EDHREC: 273 While a seven-mana commander is a pretty hard sell nowadays, especially in such not-rampy colors, Kefka is still a great commander option if you love stealing cards from other players
The Emerald cards give you plenty of indirect ways to mess up your opponent's plans, meaning that this is a slow-burn deck where every play counts if you want to win
(They each put the top card of their library into their graveyard.) : Each player mills a card